diff options
Diffstat (limited to 'debian/transcode/transcode-1.1.7/import/probe_mplayer.c')
| -rw-r--r-- | debian/transcode/transcode-1.1.7/import/probe_mplayer.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/debian/transcode/transcode-1.1.7/import/probe_mplayer.c b/debian/transcode/transcode-1.1.7/import/probe_mplayer.c new file mode 100644 index 00000000..e079b88e --- /dev/null +++ b/debian/transcode/transcode-1.1.7/import/probe_mplayer.c @@ -0,0 +1,169 @@ +/* + * probe_mplayer.c -- probe stream data using external mplayer binary + * (C) 2005-2010 - Francesco Romani <fromani -at- gmail -dot- com> + * + * This file is part of transcode, a video stream processing tool. + * + * transcode is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * transcode is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "transcode.h" +#include "tcinfo.h" +#include "libtc/ratiocodes.h" +#include "libtc/libtc.h" +#include "ioaux.h" +#include "tc.h" + +#include <stdio.h> +#include <string.h> + +#define P_BUF_SIZE (1024) +#define LINE_SIZE (256) +#define LINE_MIN_LEN (10) /* = strlen("ID_LENGTH=") */ + +#define TAG_VBITRATE "ID_VIDEO_BITRATE" +#define TAG_WIDTH "ID_VIDEO_WIDTH" +#define TAG_HEIGHT "ID_VIDEO_HEIGHT" +#define TAG_FPS "ID_VIDEO_FPS" +#define TAG_ASR "ID_VIDEO_ASPECT" +#define TAG_ABITRATE "ID_AUDIO_BITRATE" +#define TAG_ARATE "ID_AUDIO_RATE" +#define TAG_ACHANS "ID_AUDIO_NCH" + + +#define VAL_SEP '=' /* single character! */ + +static int fetch_val_int(const char *line) +{ + const char *pc = strchr(line, VAL_SEP); + if (pc != NULL && (pc + 1) != NULL) { + return atoi(pc + 1); + } + return -1; +} + +static double fetch_val_double(const char *line) +{ + const char *pc = strchr(line, VAL_SEP); + if (pc != NULL && (pc + 1) != NULL) { + return atof(pc + 1); + } + return -1.0; +} + +static int is_identify_line(const char *line) +{ + size_t len = 0; + if (!line) { + return 0; + } + + len = strlen(line); + if (len < LINE_MIN_LEN) { + return 0; + } + + if (line[0] == 'I' && line[1] == 'D' && line[2] == '_') { + return 1; + } + return 0; +} + +static void parse_identify_line(const char *line, ProbeInfo *info) +{ + int do_audio = 0; + + if (!line || !info) { + return; + } + + if (0 == strncmp(TAG_VBITRATE, line, strlen(TAG_VBITRATE))) { + info->bitrate = fetch_val_int(line) / 1000; + } else if (0 == strncmp(TAG_WIDTH, line, strlen(TAG_WIDTH))) { + info->width = fetch_val_int(line); + } else if (0 == strncmp(TAG_HEIGHT, line, strlen(TAG_HEIGHT))) { + info->height = fetch_val_int(line); + } else if (0 == strncmp(TAG_FPS, line, strlen(TAG_FPS))) { + info->fps = fetch_val_double(line); + tc_frc_code_from_value(&info->frc, info->fps); + } else if (0 == strncmp(TAG_ABITRATE, line, strlen(TAG_ABITRATE))) { + info->track[0].bitrate = fetch_val_int(line) / 1000; + do_audio = 1; + } else if (0 == strncmp(TAG_ACHANS, line, strlen(TAG_ACHANS))) { + info->track[0].chan = fetch_val_int(line); + do_audio = 1; + } else if(0 == strncmp(TAG_ARATE, line, strlen(TAG_ARATE))) { + info->track[0].samplerate = fetch_val_int(line); + do_audio = 1; + } + + if(do_audio) { + /* common audio settings */ + info->track[0].bits = BITS; /* mplayer doesn't provide this, yet */ + info->track[0].format = 0x1; /* PCM */ + info->track[0].pts_start = 0; + info->num_tracks = 1; + } +} + +void probe_mplayer(info_t *ipipe) +{ + char probe_cmd_buf[P_BUF_SIZE] = { 0, }; + FILE *pipefd = NULL; + int ret; + + if (!ipipe) { + /* should never happen */ + return; + } + + if(tc_test_program("mplayer") != 0) { + tc_log_error(__FILE__, "probe aborted: mplayer binary not found."); + return; + } + + ipipe->probe_info->codec = TC_CODEC_UNKNOWN; + /* otherwise we don't use mplayer... */ + + ret = tc_snprintf(probe_cmd_buf, P_BUF_SIZE, + "mplayer -quiet -identify -ao null " + "-vo null -frames 0 %s 2> /dev/null", + ipipe->name); + if (ret < 0) { + return; + } + + pipefd = popen(probe_cmd_buf, "r"); + if (pipefd != NULL) { + char line_buf[LINE_SIZE] = { 0, }; + + /* if mplayer runs, we are pretty confident to get right results */ + while(fgets(line_buf, LINE_SIZE, pipefd) != NULL) { + line_buf[LINE_SIZE - 1] = '\0'; + if (is_identify_line(line_buf)) { + parse_identify_line(line_buf, ipipe->probe_info); + } + } + pclose(pipefd); + + /* final adjustement */ + ipipe->probe_info->magic = TC_MAGIC_MPLAYER; + } else { + /* error in probing */ + ipipe->error = 1; + ipipe->probe_info->magic = TC_MAGIC_UNKNOWN; + } + return; +} |